Improvement in grain-separators



UNITED STATES PATENT OFFICE,

ASA LOW, OF SHELL ROCK, IOWA.

IMPROVEMENT IN GRAIN-SEPARATORS.

Specification forming part of Letters Patent No. 153,835, dated August 4, 1874 application filed March 16, 1874.-

To all whom it may concern:

Be it known that I, ASA LOW, of Shell Rock, in the county of Butler and State of Iowa, have invented a new and Improved Thrashing-Machine Attachment; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing, forming a part of this specification, in which- The figures of drawing are longitudinal sectional elevations.

The invention will first be fully described.

in connection with all that is necessary to a full understanding thereof, and then pointed out in the claims.

A represents the axle of a thrashing-machine, to which I propose to attach my improvement; B B, the sills, and O a fan-case located between the said sills. D is the fan, whose shaft is jo'urnaled centrally in the fancase, and has on its ends the pulleys d d. E is a shaft, on whose cranks e e are pivoted the arms f f of a riddle, F, that is attached by cord g, near its front end, to, and runs on, friction-rolls G G. This riddle extends under the lower end of straw-carrier frame H H, that is provided with pivoted ventilator-boards h in its upper floor H, resting upon, and more or less closed by, a notched bar, I, and adjusting-lever J. V

The grain that is blown over the riddle of the thrashing-machine, and. over the rattlerake K, is thus arrested by the carrier, an open endless slat-apron, (not shown in drawing,) traveling up floor H, respectively, at d and 01 the former portion being carried up and and through theventilators h.

, reaching the riddle.

In order to make the current of wind go higher or lower, I place in front of the fan, and under the riddle, a board, m, which may be raised or lowered by a thumbscrew or other adjustable device.

The grain that is blown over the ordinary thrashing-machine riddles passes directly to the riddle of my attachment, while that carried away in the straw upand over the rattle-rake (indicated at K in the drawing) is first dropped through the ventilators, and then returned, with the straw-carrier, on the lower floor H, to the same destination,the riddle F.

Having thus describedmy invention, what I claim is 1. The combination, with riddle F, of the crank-shaft E e, cords g g, and rolls G G, as and for the purpose specified.

2. The combination, with fan D, of boards H H, provided with ventilators h, the notched bar I, and the lever J, ,all arranged substantially as and for the purpose specified.

. ASA LOW.

Witnesses:

BENJAMIN Ronnn'rs, O. E. PATCHEN. 

